Another possibility would be to do a video and post it to You-Tube. There are a lot of how-to videos on all sorts of subjects (everything from resaccing a pen to knitting cast-on techniques.
The people would still have to get their own supplies and tools, of course, but it would be better than nothing.
Ruth Morrisson aka inkstainedruth
ETA: The downside for you would be that you wouldn't get paid. The upside is that you wouldn't have to make sure you had enough tools and kits to go around (having taught hands-on needlework classes, I know what that can entail; the first time I taught people how to make fine netting (as an embroidery ground) I was given a two hour timeslot and limited the class to five people, and I thought -- how am I possibly going to fill two hours? And I very quickly found out that it really did take that long, and one girl didn't completely get it even then...
The downside for the viewers is that they would have to get the tools and supplies on their own (and not be able to price stuff in economies of scale). And that they would not be able to ask you questions. The upside (besides not paying for the class and travel expenses) is that they could watch the video at their leisure -- possibly more than one time.
Edited by inkstainedruth, 19 February 2016 - 19:47.
"It's very nice, but frankly, when I signed that list for a P-51, what I had in mind was a fountain pen."